Window-sash fastener.



0. LA MARSH. WINDOW SASH FASTENBR.

APPLICATION FILED APR. 15, 1914.

1,1 1 6,300, Patented Nov. 3, 1914.

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QLKVULT'LVYEIIiSES; INVENTOR, 61 m. BY m\fl ATTORNEY THE NORRIS PETERS CO.. PHOTO-LITHQ. WASHING TON. D. c

OLIVER LA MARSH, 0F WHEATLEY, ONTARIO, CANADA.

WINDOW-SASH FASTENER.

Specification of Letters Patent.

Patented Nov. 3, 1914.

Application filed April 15, 1914. Serial No. 831,944.

To all whom it may concern Be it known that I, OLIVER LA MAnsi-i, gentleman, of the town of VVheatley, county of Kent, Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain new and useful Improvements in WVindow-Sash Fasteners, of which the following is a specification.

My invention relates to improvements in window sash fasteners, and relates more particularly to that type of sash fastener which performs the double function of locking the window sash closed andholding the sash open, and the object of my invention is to design what I may term a gravity pawl to cooperate with means carried by the window sash, to lock the sash closed or: hold the sash open, so that the said pawl may be automatic in its action when the window sash is raised, and the construction of my preferred form of invention will be hereinafter set forth and what I claim as new will be pointed out in the claim forming part of this specification.

Figure 1 is a perspective view of a lower window sash and portion of the upper sash, together with the frame work therefor, showing my invention positioned to co-act with the lower window sash to lock it in closed position, and Fig. 2 is a vertical cross section on the line 2--2 Fig. 1, showing the window sash opened.

In the drawings like characters of reference indicate corresponding parts in each figure.

Although I show and describe my invention as particulary applicable for use in connection with window sashes, it will of course be understood that it is within the scope of my invention to use the principle thereof in connection with vertically movable members,

, such as panels or cut-offs; for example, panels controlling the opening leading into the shafts of dumb waiters.

Although in the following specification I show and describe the gravity pawl as attached toa window frame, it will of course be understood that the position of the parts of my device may be reversed without departing from the spirit of my invention; that is to say, the gravity pawl may be attached to the window sash itself and the member co-acting therewith may be attached to the window frame.

A are the uprights of the window frame B, and having vertical movements between these uprights A is the lower window sash C.

D is portion of the upper window sash. Of course in many cases only one window sash may be used. Pivoted to the inner. side Of one of the uprights A is the gravity pawl .E. A screw F or. other suitable fastening means passes through a hole (not shown) formed in the gravity pawl E and pivots the same in place. t.

The weight of the pawl E is so distributed that the center of gravity thereof will be normally above and to one side of thepivotal point. The object of this construction is to causethe nose G which is in the form of any well known detent, to be automatically p0- sitioncd so that the gravity pawl E will coact with the toothed or notched bar or rack, or equivalent member, carried by the window sash, to lock the same in open position when desired.

H. is the headof the gravity pawl E with which is preferably integrally formed the nose G. The said nose G is shownin Fig. 2 as resting in one of the notches I formed in the flange J l of the plate K secured by screws or other fastening means L to one of the vertical members 0 of the window sash C. Should the sash be raised higher than the position illustrated in Fig. 2, in due course the nose G would find lodgment in the notch and so support the sash. The head H of the gravity pawl E provided with the nose G, positions the center of gravity of the said gravity pawl above and to one side of the pivotal point which in the disclosure is the screw F. In the disclosure, the center of gravity naturally operates to the left of the screw F, and the result is that when the gravity pawl E is in the position illustrated in Fig. 2, the nose Gr will always follow the configuration of the edge of the flange J. The sides of the nose G are preferably flared outwardly as illustrated in Fig. 1 so as to broaden the outer end of the nose. Now when the nose is in the position just described and illustrated in Fig. 2, the gravity pawl E will automatically find lodgment in one of the notches formed in the flange J and support the window sash C open.

In order to utilize my gravity pawl E to lock the sash closed, I provide the same with a depending tail 2 having a detent end 3. The sides of this detent end 3 are preferably flared outwardly as illustrated in Fig. 1. To lock the sash closed, it is necessary for the gravity awl E to be moved by hand into the position illustrated in Fig. 1 so that the detent end thereof will find lodgment in the notch 4 formed in the flange J. The gravity pawl E is so balanced when in the position illustrated in Fig. 1 that the center of grav-y ity of the same will be above the screw F and to the right thereof so as to maintain the tail 2 in the position described.

The nose-provided member is constructed to position the nose Gr substantially at an angle of 45 to. the tail 2. This construction positions thesaid nose and tail far enough apart so that they will not interfere with each other, and yet permit of their being alternately brought into action very speedily.

When the pawl E is in the position illustrated in Fig. 1, the outer side of the head H thereof can be pressed upon by the thumb and finger and so readily disengage the tail 2 from the notch 4. The said pawl is pivoted in'place to one ofthe uprights A to permit the outer portion of the head H to project beyond the outer side of said upright when the pawl occupies the position illustratedin Fig. 1.

The nose-provided head H and tail 2 are disposed radially in respect of the pivotal point'of the pawl, and the angular relationship of the nose G and tail 2 permit the said i nose to positively engage with the notches g,

as the required movement of the pawl E for this purpose does not meet with any opposi tion frointhe tail 2. When the said nose is riding on the flange J between any given pair of notches g,.the tail 2 is necessarily moved farther from this flange than when the parts are in the position shown in Fig. 2. As the said nose G enters one of the notches 9, it is assisted in its movement by the tail 2 assuming its substantially vertical position as it moves closer to the flange J. The construction described so distributes the weight of the pawl E as to insure its engagement with. the notch a when the parts occupy the position illustrated in Fig. 1. In'this p0sithe head H performs 2 to occupy the notch l.

What I claim as my invention is:

A gravity pawl adapted to'be used on a sash frame, comprising a nose-provided member and a tail, which occupy an angle of substantially degrees in respect of each other, which angle always faces toward the sash frame; the saidnose-providedmember and tail radiating from a pivotal hole formed in said pawl, and a head carried by said nose-provided member and extending laterallytherefrom and positioned substantially midway the end of said nose-provided memher and said pivotalh'ole so as to occupy a position to be readily engaged by the finger to permit the said pawl to be manipulated; said nose-provided member and said tail, intended to be alternatelybrought into operation;the construction described at vall times maintaining the center of gravity of saidpawl above said pivotal hole, as set forth.

In testimony whereof I affix my signature in presence of two-witnesses.

onivnn LA Manse.

Witnesses EDITH M. Fox, T. M. Fox.

Copies of thispatentmay be obtained for five cents each, by addressing the Commissioner of latents,

Washington, D. G. l 

